Shako

Shako (Hungarian Csákó, peaked cap), a tall military cap, either cylindrical or conical, wider or narrower at the top, first introduced in France in 1806 to replace the bicorne, and eventually adopted by the armed forces of many other nations. During the reign of Frederic William IV, the Prussian shako was replaced by the Pickelhaube helmet; the Austrian army adopted a low round hat, and the French army introduced the kepi. German chasseurs, sharpshooters, signal troops, airship crews, and marines of the period wore a similarly shaped cap.